Tax or not tax?

Can anyone tell me if the pymant cart of Boonex with or without tax is.

Here in Belgium it's 21% other countries more or less.

How to configure that?

I like more to see the prices without taxt. (because other coutries Besides
Belgium in the European Union don't pay taxes...

see if it is setup in paypal

Ok, but i use multiple payments businesses.

Also people can pay with bitcoins on Busimatch.

I understand from your answer that this can't be set-up in Dolphin?